public class UserserverImpl implements Userserver{
    public void add() {
        System.out.println("zeng");
    }

    public void delete() {
        System.out.println("shan");
    }

    public void updata() {
        System.out.println("gai");
    }

    public void query() {
        System.out.println("cha");
    }
}

